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Publication Type J
Authors Kahli, H., H. Sbartai, T. Cohen-Bouhacina and J. Bourguignon
Title Characterization of cadmium accumulation and phytoextraction in three species of the genus Atriplex (canescens, halimus and nummularia) in the presence or absence of salt
Source Plant Physiology and Biochemistry
Language English
Author Keywords Halophytes Cadmium stress Salt Accumulation Tolerance Phytoextraction hydrogen-peroxide heavy-metals sesuvium-portulacastrum lipid-peroxidation mineral-nutrition 2 halophytes cd-toxicity stress responses l. Plant Sciences
Abstract This study aims to establish for the first time a comparison between the resistance to cadmium (Cd) stress of three halophyte species, Atriplex canescens, Atriplex halimus and Atriplex nummularia in addition to their already known tolerance for salt and drought. Plants were exposed to CdCl2 (20 and 50 mu M) in the presence or in the absence of salt (50 mM NaCl) for one and two months. The amount of accumulated Cd was determined in the roots and leaves as well as the amount excreted on the surface of the leaves. Physiological parameters such as chlorophyll content and stress biomarkers, including malondialdehyde and enzymatic activities, were then analyzed. The results show that these plants are able to neutralize the excess of reactive oxygen species resulting from treatments by activating the antioxidant defense mechanisms in order to restore the homeostasis of cells. All three species are also able to accumulate high amounts of Cd in the leaves (several hundred mg of Cd/kg of dry leaves) and this phenomenon is amplified in the presence of salt. All together our results allow to consider the three Atriplex species as hyperaccumulators in the presence/absence of salt and as good candidates in a strategy of Cd phytoextraction in the presence of low concentrations of the pollutant. Nevertheless, both A. canescens and A. nummularia species seem to have a higher capacity to hyper-accumulate Cd when the concentration of Cd reaches higher level of contamination.
Author Address [Kahli, Houssem; Sbartai, Hana] Univ Badji Mokhtar Annaba, Lab Toxicol Cellulaire LTC, CRS UBMA, Annaba 23000, Algeria. [Kahli, Houssem; Cohen-Bouhacina, Touria] Univ Bordeaux, LOMA, CNRS, UMR 5798, F-33400 Talence, France. [Bourguignon, Jacques] Univ Grenoble Alpes, Lab Physiol Cellulaire Vegetale, CNRS, INRAE,CEA, F-38000 Grenoble, France. Sbartai, H (corresponding author), Univ Badji Mokhtar Annaba, Lab Toxicol Cellulaire LTC, CRS UBMA, Annaba 23000, Algeria. hana_sbartai@yahoo.fr
ISSN 0981-9428
ISBN 0981-9428
29-Character Source Abbreviation Plant Physiol. Biochem.
Publication Date Sep
Year Published 2021
Volume 166
Beginning Page 902-911
Digital Object Identifier (DOI) 10.1016/j.plaphy.2021.06.027
Unique Article Identifier WOS:000692319900029

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